Automobile bumper and device for preventing serial collision of automobile

Abstract

The invention relates to an automobile bumper and a device for preventing serial collision of an automobile. The automobile bumper comprises a rubber inflatable cushion, a first conducting strip, a second conducting strip, a relay and an automobile brake driving part. The rubber inflatable cushion is arranged in front of the automobile, the first conducting strip is embedded and fixed on one side far away from the front of the automobile, and the second conducting strip is embedded and fixed on one side close to the front of the automobile and is opposite to the first conducting strip. The first connecting point of the relay is connected with the first conducting strip, the second connecting point is connected with the external power supply, the external power supply is further connected with the second conducting strip, and the power supply input end of the automobile brake driving component is connected with the third connecting point of the relay and further connected with the brake pedal. When the rubber inflatable cushion is inflated, an inflation gap is formed between the two conductive sheets; and when the inflated rubber inflatable cushion is extruded, the two conducting strips are contacted. After the first connecting point of the relay is powered on, the second connecting point and the third connecting point are connected, the automobile brake driving component is powered on to work, automobile collision braking can be effectively achieved, and serial collision is prevented.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to an automotive bumper and a device for preventing chain collisions in automobiles. Background Technology

[0002] In the field of automotive safety, the bumper, as a key buffer structure in the event of a collision, has its material properties directly affecting its protective effect. Currently, the mainstream engineering plastics or metal materials have limited energy absorption and buffering capabilities, making it difficult to effectively weaken the impact force in the event of a collision, potentially causing serious damage to the lives of occupants and the vehicle itself. Meanwhile, radar ranging and visual collision avoidance technologies are widely used to reduce collision risks.

[0003] However, the aforementioned collision avoidance technologies still have significant limitations in practical use: both are susceptible to adverse weather conditions (such as rain, fog, hail), dust accumulation, sensor malfunctions, and system program failures, leading to decreased stability of the collision avoidance function; and due to limitations in their technical principles, both radar-based collision avoidance and visual collision avoidance have unavoidable detection blind spots. Furthermore, for intelligent vehicles such as autonomous vehicles, when connected to the internet, they are vulnerable to hacking and potentially catastrophic collisions, such as causing radar collision avoidance technology to fail and triggering chain-reaction collisions, or causing the vehicle system to malfunction and lead to chain-reaction collisions.

[0004] The aforementioned defects make it difficult to avoid serious collision accidents such as chain collisions even when cars are equipped with these two types of collision avoidance technologies, resulting in a large number of casualties and huge property losses. Therefore, existing automotive collision avoidance technologies and structures can no longer meet the higher standards of safety protection requirements, and there is an urgent need to develop a collision avoidance technology solution that can operate independently of the vehicle system. Summary of the Invention

[0005] Therefore, it is necessary to provide a car bumper and a device to prevent chain collisions.

[0006] This application provides a car bumper and a device for preventing chain-reaction collisions, comprising:

[0007] Rubber inflatable mat, which is installed at the front of a car;

[0008] The first conductive sheet is embedded in and fixed to the first side of the rubber inflatable pad;

[0009] The second conductive sheet is embedded and fixed in the rubber inflatable pad and is opposite to the first side; when the rubber inflatable pad is installed at the front of the car, the second side faces the car body and the first side faces the car's external space.

[0010] The relay has a first connection point connected to a first conductive plate, and a second connection point used to connect to an external power supply, which is also connected to the second conductive plate.

[0011] The automotive brake drive component has its power input terminal connected to the third connection point of the relay. The automotive brake drive component is used to connect to the brake pedal of the vehicle. When the automotive brake drive component is powered on, it drives the brake pedal to be pressed down.

[0012] When the rubber inflatable pad is inflated, there is an inflation gap between the first conductive sheet and the second conductive sheet; when the inflated rubber inflatable pad is squeezed, the second conductive sheet will come into contact with the first conductive sheet; when the first connection point of the relay is energized, the second connection point and the third connection point of the relay are connected to enable the vehicle braking drive component to operate.

[0013] In one embodiment, the first conductive sheet is embedded and fixed in close contact with the rubber inflatable pad on the side away from the front of the vehicle.

[0014] In one embodiment, the thickness of the first rubber layer is less than the thickness of the second rubber layer. The first rubber layer is the rubber layer between the first conductive sheet and the side of the rubber inflatable pad away from the front of the vehicle, and the second rubber layer is the rubber layer between the second conductive sheet and the side of the rubber inflatable pad close to the front of the vehicle.

[0015] In one embodiment, the thickness of the first rubber layer is 1mm-2mm, and the thickness of the second rubber layer is 5mm-10mm.

[0016] In one embodiment, the lengths of the first conductive sheet and the second conductive sheet are greater than or equal to the length of the rubber inflatable pad.

[0017] In one embodiment, both the first conductive sheet and the second conductive sheet are made of copper.

[0018] In one embodiment, the car bumper and the device for preventing chain collisions further include:

[0019] A barometer is used to monitor the air pressure of rubber inflatable pads.

[0020] In one embodiment, the third connection point of the relay is also connected to the first connection point of the relay.

[0021] In one embodiment, the rubber inflatable pad is elliptical in shape, resembling a rectangular U.

[0022] In one embodiment, the rubber inflatable pad is prepared based on the following rubber formulation, wherein the rubber formulation, by mass parts, comprises:

[0023] Butyl rubber, 86-98 parts;

[0024] Zinc oxide, 5.95 parts - 6.05 parts;

[0025] Stearic acid, 2.3-2.6 parts;

[0026] Anti-aging agent NBC, 1.1-1.2 parts;

[0027] Carbon black N220, 19-21 parts;

[0028] Paraffin oil, 7.5-8 parts;

[0029] Sulfur, 1.7 to 1.82 parts;

[0030] Accelerator TRA, 0.5-0.62 parts;

[0031] Accelerator NOBS, 1.1-1.4 parts.

[0032] The aforementioned car bumper and device for preventing chain collisions have at least the following beneficial effects:

[0033] Using a rubber inflatable cushion as the core buffer and triggering carrier, it is installed at the front of the vehicle. Upon impact, the rubber inflatable cushion first weakens the impact force through its own energy-absorbing properties, reducing initial injury to the vehicle and occupants. Simultaneously, utilizing the inflation gap between the first and second conductive plates, the subsequent braking process is triggered only when the rubber inflatable cushion deforms to a preset threshold due to impact compression. This effectively avoids false triggering and ensures the stability of the vehicle during normal driving. In terms of braking triggering logic, a relay achieves precise on / off control of the circuit. When the two conductive plates contact and energize the first connection point of the relay, the second and third connection points of the relay quickly connect, supplying power to the vehicle's braking drive components. The entire circuit response process is efficient and reliable, enabling rapid initiation of the braking procedure after a collision. The vehicle's braking drive components possess… Available in multiple implementation options, whether it's an electric push-pull rod, a motor with a transmission structure, or a linear motion device, it can stably convert electrical energy into mechanical energy. Through connection with the brake pedal, it precisely drives the brake pedal to press down, simulating a driver's normal braking operation. This ensures that the car achieves emergency braking in a short time, avoiding chain accidents caused by the car not stopping in time after a collision, and significantly reducing the loss of life and property caused by collisions. In addition, the entire device has a simple structural design and clear connection logic for each component. It does not rely on complex external environmental detection equipment (such as radar or vision probes) and is unaffected by external factors such as weather and dust. It is applicable to a wide range of scenarios and can play a role in various scenarios that may cause collisions, such as sudden abnormalities of the driver (such as illness or fatigue) or car malfunctions. It further improves the safety protection level of vehicle driving and provides stable, efficient, and reliable protection for vehicle collision safety. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a car bumper and a device for preventing chain collisions in one embodiment;

[0036] Figure 2 This is a partially enlarged schematic diagram of a relay in one embodiment. Detailed Implementation

[0037] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0040] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0041] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0042] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0043] In one exemplary embodiment, such as Figure 1 and Figure 2As shown, this application provides a car bumper and a device for preventing chain collisions, which includes a rubber inflatable pad 2, a first conductive sheet 4, a second conductive sheet 6, a relay 8, and a car brake drive component 10. The rubber inflatable pad 2 is installed at the front of the car; the first conductive sheet 4 is embedded and fixed within a first side of the rubber inflatable pad 2; the second conductive sheet 6 is embedded and fixed within a second side of the rubber inflatable pad 2 opposite to the first side; when the rubber inflatable pad is installed at the front of the car, the second side faces the car body, and the first side faces the external space of the car; the first connection point S1 of the relay 8 is connected to the first conductive sheet 4, and the second connection point S2 of the relay 8 is used to connect to an external power supply 100, which is also connected to the second conductive sheet 6; the power input terminal of the car brake drive component 10 is connected to the third connection point S3 of the relay 8. The automotive brake drive component 10 is used to connect to or control the brake pedal 300 of the vehicle or whether the vehicle is braking. When the automotive brake drive component 10 is energized, it drives the brake pedal 300 to press down. When the rubber inflatable pad 2 is inflated, there is an inflation gap between the first conductive sheet 4 and the second conductive sheet 6. When the inflated rubber inflatable pad 2 is squeezed, the second conductive sheet 6 will contact the first conductive sheet 4. When the first connection point S1 of the relay 8 is energized, the second connection point S2 and the third connection point S3 of the relay 8 are connected to energize the automotive brake drive component 10.

[0044] The automotive brake drive component 10 can refer to an electric push-pull rod, which has a telescopic "push-pull rod" structure and can output traction force (pull back) or thrust in a linear motion. Through the traction of the brake cable, it drives the brake pedal 300 to press down. Alternatively, it can refer to a motor as a power source, combined with a transmission structure such as gears, lead screws, or steel cables, which converts the rotational motion of the motor into linear motion, pulling the brake cable and driving the brake pedal 300. It can also be a linear motion device that directly uses standardized linear drive elements (such as linear motors, pneumatic push rods, etc.), without the need for additional transmission conversion, and can directly output linear traction force, connecting with the brake cable and brake pedal 300 to achieve braking. The automotive brake drive component 10 can also be a pressure motor for the brake pump. When the motor is energized, it pressurizes the brake fluid inside the brake pump, just as when the driver presses the brake pedal 300, it pressurizes the hydraulic fluid inside the brake pump. The hydraulic fluid transmits pressure to the brake caliper through the oil pipe, and the brake caliper moves to clamp the brake pads, thereby braking the car.

[0045] For example, the rubber inflatable pad 2, serving as a buffer and triggering carrier, is pre-installed at the front of the vehicle and is in a fully inflated state. At this time, the rubber inflatable pad 2 not only performs the basic protective function of buffering and absorbing energy, but its internal structure is also in a state of readiness for triggering. The first conductive sheet 4 is embedded and fixed inside the rubber inflatable pad 2 on the side away from the front of the vehicle, while the second conductive sheet 6 is embedded and fixed inside the rubber inflatable pad 2 on the side closer to the front of the vehicle. The two are arranged opposite to each other, and when the rubber inflatable pad 2 is inflated, a specific inflation gap is maintained between the first conductive sheet 4 and the second conductive sheet 6, and no contact occurs. At this time, the circuit is in a disconnected state, and neither the relay 8 nor the vehicle braking drive component 10 is energized. The vehicle can drive normally, and the brake pedal 300 is normally operated by the driver. Meanwhile, the first connection point S1 of the relay 8 is connected to the first conductive piece 4, the second connection point S2 of the relay 8 is connected to the external power supply 100, the external power supply 100 is also connected to the second conductive piece 6, the power supply input terminal of the vehicle brake drive component 10 is connected to the third connection point S3 of the relay 8, and the vehicle brake drive component 10 is connected to the vehicle brake pedal 300, thus preparing the structure and circuit for the transmission of subsequent braking actions.

[0046] When a collision occurs during vehicle operation, i.e., when the rubber inflatable pad 2 is subjected to external pressure (such as colliding with a person or other object), the device enters the triggering phase. The external force generated by the collision causes the inflated rubber inflatable pad 2 to deform inward. As the collision force or the degree of compression increases, the deformation of the rubber inflatable pad 2 gradually increases until it reaches a preset trigger threshold. During this deformation process, the first conductive sheet 4 and the second conductive sheet 6 embedded in the rubber inflatable pad 2 move synchronously with the deformation of the rubber inflatable pad 2. The original inflation gap between the two gradually narrows, and eventually the second conductive sheet 6 comes into contact with the first conductive sheet 4, completing the mechanical triggering action and providing the preconditions for circuit conduction.

[0047] Since the external power supply 100 is connected to the second conductive piece 6, the second conductive piece 6 is always energized. When the second conductive piece 6 comes into contact with the first conductive piece 4, current is transmitted through the second conductive piece 6 to the first conductive piece 4. Furthermore, because the first connection point S1 of the relay 8 is connected to the first conductive piece 4, the current is further transmitted to the first connection point S1 of the relay 8, energizing the first connection point S1. When the first connection point S1 of the relay 8 is energized, its internal coil generates electromagnetic attraction, thereby connecting the second connection point S2 and the third connection point S3 of the relay 8. The second connection point S2 of the relay 8 is connected to the external power supply 100. At this time, the current from the external power supply 100 can be transmitted through the second connection point S2 and the third connection point S3 of the relay 8 to the power input terminal of the vehicle brake drive component 10, providing electrical power to the vehicle brake drive component 10 and completing the transition from mechanical triggering to circuit conduction.

[0048] After being energized, the automotive brake drive component 10 converts electrical energy into mechanical energy and outputs power (such as linear traction or pushing action) through its own motion mechanism. Since the automotive brake drive component 10 is connected to the vehicle's brake pedal 300, its output mechanical energy directly acts on the brake pedal 300, driving it downwards. This action completely simulates the driver's normal operation of pressing the brake pedal 300, activating the vehicle's braking system and producing a braking effect, allowing the vehicle to decelerate and stop quickly. The entire process, from the occurrence of a collision, contact of the conductive plates, circuit connection, to the automotive brake drive component 10 driving the brake pedal 300 to brake, forms a closed loop, ultimately achieving emergency braking after a collision, preventing chain reactions or reducing damage caused by the collision.

[0049] The aforementioned car bumper and the device for preventing chain collisions use an inflatable rubber pad 2 as the core buffer and triggering carrier. Installed at the front of the car, the inflatable rubber pad 2 first weakens the impact force through its own energy-absorbing properties, reducing initial damage to the car and occupants. Simultaneously, utilizing the inflation gap between the first conductive piece 4 and the second conductive piece 6, the two conductive pieces only contact to trigger the subsequent braking process when the rubber pad 2 deforms to a preset threshold due to the impact, effectively avoiding false triggering and ensuring the stability of the car during normal driving. In terms of braking triggering logic, a relay 8 achieves precise on / off control of the circuit. When the two conductive pieces contact, energizing the first connection point S1 of the relay 8, the second connection point S2 and the third connection point S3 of the relay 8 quickly connect, supplying power to the car's braking drive component 10. The entire circuit response process is efficient and reliable, enabling rapid activation after a collision. The braking procedure; the automotive braking drive component 10 has multiple optional implementation forms. Whether it is an electric push-pull rod, a motor with a transmission structure, or a linear motion device, it can stably convert electrical energy into mechanical energy. Through the connection with the brake pedal 300, it precisely drives the brake pedal 300 to press down, simulating the driver's normal braking operation, ensuring that the car achieves emergency braking in a short time, avoiding chain accidents caused by the car not stopping in time after a collision, and significantly reducing the loss of life and property caused by the collision. In addition, the entire device has a simple structural design and clear connection logic of each component. It does not rely on complex external environmental detection equipment (such as radar, vision probes), is not affected by external factors such as weather and dust, and has a wide range of applicable scenarios. It can play a role in various scenarios that may cause collisions, such as sudden abnormalities of the driver (such as illness or fatigue) or car malfunctions, further improving the safety protection level of the car and providing stable, efficient and reliable protection for car collision safety.

[0050] In one exemplary embodiment, such as Figure 1As shown, the first conductive sheet 4 is embedded and tightly fixed inside the rubber inflatable pad 2 on the side away from the front of the car.

[0051] For example, when a frontal collision occurs, the external impact force first acts on the side of the rubber inflatable cushion 2 furthest from the front of the car. Since the first conductive sheet 4 is in close contact with the inner wall of this side, the compression deformation caused by the collision is transmitted to the first conductive sheet 4 immediately, without needing to pass through the force transmission and buffering of other structures inside the rubber inflatable cushion 2, thus significantly shortening the time difference between "collision occurrence - conductive sheet sensing deformation". At the same time, the rubber inflatable cushion 2 itself, as a structure that replaces the bumper, is installed at the front of the car. When a collision occurs, it does not need to go through the force transmission path of a traditional bumper, and can directly bear the impact force and trigger the internal structure to act, further reducing the delay in the triggering stage.

[0052] In an exemplary embodiment, the thickness of the first rubber layer is less than the thickness of the second rubber layer. The first rubber layer is the rubber layer between the first conductive sheet 4 and the side of the rubber inflatable pad 2 away from the front of the vehicle, and the second rubber layer is the rubber layer between the second conductive sheet 6 and the side of the rubber inflatable pad 2 near the front of the vehicle.

[0053] For example, the first conductive sheet 4 needs to sense the impact and cause the rubber inflatable pad 2 to deform, thereby contacting the second conductive sheet 6 to conduct the circuit. The first rubber layer is the only rubber structure between the first conductive sheet 4 and the rubber inflatable pad 2 on the side away from the front of the car (i.e., the first contact surface where the impact force is applied). When a collision occurs at the front of the car, the external impact force will first act on the outer wall of the rubber inflatable pad 2 away from the front of the car. If the first rubber layer is thicker, the impact force needs to overcome more deformation resistance of the rubber material before it can be transmitted to the first conductive sheet 4, resulting in a delay in the deformation of the first conductive sheet 4. Conversely, if the first rubber layer is thinner, the force required for its own deformation is smaller and the deformation speed is faster, which can directly and quickly transmit the impact force to the first conductive sheet 4, so that the first conductive sheet 4 moves synchronously with the compression of the rubber inflatable pad 2 and contacts the second conductive sheet 6 to conduct the circuit more quickly, avoiding the triggering delay caused by the excessive thickness of the rubber layer. The second conductive sheet 6 is fixed inside the rubber inflatable pad 2 on the side closer to the front of the car, and this side needs to be fixedly connected to the car sheet metal (such as by glue or connecting plate screws). The second rubber layer, serving as the connecting carrier between the second conductive sheet 6 and the rubber inflatable pad 2 on the front side of the vehicle, not only needs to fix the second conductive sheet 6 but also needs to withstand the vibration during vehicle operation and the reverse force generated by the linkage of the vehicle's braking drive components 10 during braking. If the second rubber layer is too thin, its structural strength will be insufficient, which may cause the second conductive sheet 6 to loosen or shift when vibrating or under stress, disrupting its relative positional relationship with the first conductive sheet 4. This could lead to unstable circuit conduction or, in severe cases, prevent the two conductive sheets from making normal contact, directly affecting the triggering of the braking function. However, a thicker second rubber layer can enhance the structural rigidity with more rubber material, firmly fixing the position of the second conductive sheet 6 and ensuring that it always maintains a preset relative state with the first conductive sheet 4, thus guaranteeing the reliability of circuit conduction during collision triggering.

[0054] In this embodiment, the first rubber layer serves as the connection structure between the first conductive sheet 4 and the rubber inflatable pad 2 at the impact-bearing front end (away from the front of the car). Its thinner thickness reduces its own deformation resistance, allowing the impact force to be directly and quickly transmitted to the first conductive sheet 4. This avoids triggering delays caused by an excessively thick rubber layer, enabling the first conductive sheet 4 to move synchronously with the rubber inflatable pad 2 during compression, and to contact the second conductive sheet 6 more quickly to establish a conductive circuit, thus gaining crucial time for subsequent braking. Meanwhile, the second rubber layer serves as the fixing carrier between the second conductive sheet 6 and the rubber inflatable pad 2 near the front of the car (connected to the car's sheet metal end). Its thicker thickness enhances structural rigidity, effectively withstanding vibrations during vehicle operation and the reverse action of the car's braking drive component 10 during braking. Apply force to prevent the second conductive sheet 6 from loosening or shifting, ensuring that it always maintains the preset relative position with the first conductive sheet 4, avoiding unstable circuit conduction or braking function failure due to misalignment of the conductive sheets; the thin design of the first rubber layer prioritizes meeting the need for rapid triggering while retaining basic buffering capacity based on the properties of the rubber material itself, while the thick design of the second rubber layer can further absorb the impact force transmitted to the vehicle body during a collision, reducing damage to the vehicle's sheet metal and internal structure. This solves the problem of easy fixation failure caused by a single thin rubber layer, and avoids the defect of slow triggering by a single thick rubber layer. This allows the device to respond to braking efficiently while also protecting the vehicle and its occupants, comprehensively improving the safety and reliability of vehicle collision braking.

[0055] In one exemplary embodiment, the thickness of the first rubber layer is 1mm-2mm, and the thickness of the second rubber layer is 5mm-10mm.

[0056] In this embodiment, the first rubber layer needs to transmit the impact force to trigger the contact of the conductive sheet. The thin thickness of 1mm-2mm can minimize the deformation resistance. With this thickness, the rubber layer does not need to overcome too much material stress to deform with the impact. It can directly and quickly transmit the external impact force to the first conductive sheet 4, avoiding the delay in force transmission caused by excessive thickness. This ensures that the first conductive sheet 4 can deform synchronously with the rubber air pad 2 and quickly contact the second conductive sheet 6 to conduct the circuit. At the same time, the thickness of 1mm-2mm can also retain the basic buffering capacity of the rubber material. While quickly triggering, it initially weakens the impact force and avoids completely losing the buffering effect. From the perspective of the second rubber layer, it needs to fix the second conductive sheet 6 and connect to the automotive sheet metal. The thickness of 5mm-10mm can provide sufficient structural strength. At this thickness, the rubber layer can effectively withstand the vibration during vehicle operation and the reverse force of the vehicle's braking drive component 10 during braking, firmly fixing the position of the second conductive sheet 6 to prevent it from loosening or shifting, ensuring that the second conductive sheet 6 and the first conductive sheet 4 always maintain a relative alignment, and avoiding circuit failure and braking failure due to misalignment of the conductive sheets. In addition, the thicker 5mm-10mm rubber layer can further absorb the residual force transmitted to the vehicle body during a collision, reducing damage to the automotive sheet metal, and taking into account both the stability of fixation and the secondary protection function.

[0057] In one exemplary embodiment, the lengths of the first conductive sheet 4 and the second conductive sheet 6 are greater than or equal to the length of the rubber inflatable pad 2.

[0058] For example, from the perspective of collision triggering range, the rubber inflatable pad 2 needs to replace the traditional car bumper and be installed at the front of the car. A frontal collision can occur at any lateral position (such as the left, right, or middle). If the conductive sheet is shorter than the rubber inflatable pad 2, when the lateral edge area of ​​the rubber inflatable pad 2 is impacted, the deformation in that area cannot be transmitted to the conductive sheet, creating a trigger blind zone. This results in the collision occurring but the first conductive sheet 4 and the second conductive sheet 6 failing to contact the conductive circuit, thus missing the braking opportunity. However, when the length of the conductive sheet is greater than or equal to the length of the rubber inflatable pad 2, it can completely cover the lateral range of the rubber inflatable pad 2. Regardless of where the collision occurs in the lateral direction of the rubber inflatable pad 2, the resulting compression deformation can move the corresponding conductive sheet, ensuring reliable contact between the first conductive sheet 4 and the second conductive sheet 6, avoiding braking failure due to the trigger blind zone. From the perspective of circuit conductivity stability, the conductive sheet needs to achieve circuit conductivity through physical contact. If the conductive sheet is insufficient in length, local deformation of the rubber inflatable pad 2 during a collision may result in an insufficient contact area or unstable contact, causing intermittent circuit conductivity. The conductive sheet is matched or longer than the rubber air cushion 2, which ensures that the conductive sheet has sufficient contact length and area when it is deformed by collision, ensuring that the circuit is continuously and stably connected, providing stable power for the relay 8 to engage and the vehicle braking drive component 10 to start, avoiding delays or interruptions in braking action due to poor contact, and further improving the reliability of the device.

[0059] In one exemplary embodiment, both the first conductive sheet 4 and the second conductive sheet 6 are made of copper.

[0060] For example, when the rubber inflatable pad 2 is compressed and deformed inward, the conductive sheet embedded within it must undergo synchronous physical deformation to ensure precise contact between the two. Copper possesses excellent ductility, and when deforming along with the rubber inflatable pad 2, it can easily adapt to the deformation trajectory of the rubber, avoiding breakage or detachment due to excessive material hardness. Furthermore, it maintains structural integrity after deformation, preventing damage due to localized stress concentration. This ensures that the conductive sheet remains tightly fitted and moves synchronously with the rubber inflatable pad 2 during the collision, providing a structural foundation for subsequent contact and conduction. Secondly, copper is the second most conductive metal after silver. Its extremely low resistance allows current to be quickly transmitted between the conductive sheets without needing to overcome current loss or delay caused by high resistance. When the first conductive sheet 4 and the second conductive sheet 6 contact, the copper material can achieve instantaneous current transmission of "contact-to-conductivity," rapidly energizing the first connection point S1 of the relay 8, which in turn quickly connects the second connection point S2 and the third connection point S3 to power the vehicle's braking drive component 10. This significantly shortens the circuit response time and avoids braking trigger delay due to insufficient conductivity. Meanwhile, copper has stable conductivity and can maintain good conductivity even with long-term use or slight oxidation, ensuring that the device can reliably conduct the circuit in different use cycles, thereby improving the stability and service life of the overall braking system.

[0061] In one exemplary embodiment, such as Figure 1 As shown, the car bumper and the device for preventing chain collisions also include a pressure gauge 12. The pressure gauge 12 is used to monitor the air pressure of the rubber air cushion 2.

[0062] For example, the pressure gauge 12, as a tool for monitoring air pressure, helps users to monitor the air pressure of the rubber inflatable pad 2 in real time. If the air pressure is too low, the rubber inflatable pad 2 will not be able to effectively buffer the impact force due to insufficient elasticity. During a collision, it may directly cause excessive deformation of the conductive sheet or even damage to the device. At the same time, due to the small inflation gap, the conductive sheet may accidentally contact the device when there is no collision. If the air pressure is too high, the rubber inflatable pad 2 will be too hard, making it more difficult to deform during a collision. This may cause the first conductive sheet 4 and the second conductive sheet 6 to fail to contact the conductive circuit in time, delaying the braking triggering timing. It may even rupture during a collision due to over-expansion, losing its buffering and triggering functions. Through the real-time monitoring of the pressure gauge 12, the user can replenish or release gas in time to ensure that the rubber inflatable pad 2 is always within the air pressure range that meets the requirements of "buffering" and "triggering", avoiding the impact of abnormal air pressure on the device performance. The pressure gauge 12 can continuously monitor changes in air pressure and detect leaks in the rubber inflatable pad 2 in a timely manner. If the pressure gauge 12 shows that the air pressure continues to drop, it can prompt the user to check whether the rubber inflatable pad 2 is damaged so that it can be repaired or replaced in time, preventing the device from failing due to air leakage and causing a safety accident.

[0063] In this embodiment, the pressure gauge 12 is a key auxiliary component to ensure the normal function of the rubber air cushion 2, the reliable triggering of the device for braking, and the safety of vehicle driving. It fills the gap that the air pressure of the rubber air cushion 2 cannot be intuitively judged, making the use and maintenance of the device more controllable.

[0064] In an exemplary embodiment, the third connection point S3 of the relay 8 is also connected to the first connection point S1 of the relay 8.

[0065] For example, during a collision, the rubber inflatable pad 2 may rebound after deformation or the impact force may weaken, causing the first conductive sheet 4 and the second conductive sheet 6 to temporarily separate. If a self-locking circuit is not provided, the separation of the first conductive sheet 4 and the second conductive sheet 6 will de-energize the first connection point S1 of the relay 8, which in turn will cause the second connection point S2 and the third connection point S3 of the relay 8 to disconnect. The vehicle's braking drive component 10 will lose power and stop working, the braking action will be interrupted, and the vehicle will not be able to stop completely. When the third connection point S3 of the relay 8 is connected to the first connection point S1, a stable self-locking circuit can be formed: when the collision causes the first conductive piece 4 and the second conductive piece 6 to contact, the first connection point S1 of the relay 8 is energized, its internal coil is attracted, and the second connection point S2 (connected to the external power supply 100) and the third connection point S3 are connected; at this time, the third connection point S3 feeds back the voltage of the external power supply 100 to the first connection point S1 through its connection with the first connection point S1. Even if the first conductive piece 4 and the second conductive piece 6 are subsequently separated, causing the initial power supply to be interrupted, the first connection point S1 can still continuously obtain power through the third connection point S3, maintain the attracted state of the relay 8 coil, and ensure that the second connection point S2 and the third connection point S3 are always connected, so that the vehicle braking drive component 10 is continuously energized and works until the vehicle is completely stopped.

[0066] In this embodiment, by connecting the third connection point S3 of the relay 8 with the first connection point S1 to form a self-locking circuit, after the conductive sheet contacts and energizes the first connection point S1 of the relay 8, and the coil is energized to connect the second connection point S2 and the third connection point S3, the voltage of the external power supply 100 can be fed back to the first connection point S1 through the third connection point S3. Even if the conductive sheet is subsequently separated, the first connection point S1 can still continuously obtain power to maintain the coil of the relay 8 in an energized state, ensuring that the second connection point S2 and the third connection point S3 are always connected, and the vehicle braking drive component 10 is continuously energized and works until the vehicle is completely stopped, ensuring that the braking action is continuous and uninterrupted, greatly improving the reliability and safety of collision braking, and avoiding additional loss of life and property caused by incomplete braking.

[0067] In one exemplary embodiment, the rubber inflatable pad 2 is elliptical rectangular U-shaped.

[0068] In this embodiment, the elliptical rectangular U-shape can cover a wider area in front of the car laterally. Compared with ordinary rectangles or circles, its U-shaped structure can extend appropriately to both sides of the car, better adapting to the lateral dimensions in front of the car. Regardless of whether the collision occurs in the middle, left, or right area in front of the car, the impact force can be absorbed by the corresponding part of the U-shaped structure, reducing the "blind spot". Secondly, during a collision, the arc-shaped structure can disperse the concentrated impact force, avoiding excessive local stress that could cause the rubber air cushion 2 to break. The U-shaped groove can absorb the collision energy through a larger deformation space, further weakening the impact force. This not only improves the initial protection effect for the car and people, but also ensures that the rubber air cushion 2 can still deform the internal conductive sheet after the collision, ensuring the reliability of subsequent braking triggering.

[0069] In an exemplary embodiment, the rubber inflatable pad is prepared based on the following rubber formulation, which, by mass parts, comprises: butyl rubber, 86-98 parts; zinc oxide, 5.95-6.05 parts; stearic acid, 2.3-2.6 parts; antioxidant NBC, 1.1-1.2 parts; carbon black N220, 19-21 parts; paraffin oil, 7.5-8 parts; sulfur, 1.7-1.82 parts; accelerator TRA, 0.5-0.62 parts; and accelerator NOBS, 1.1-1.4 parts.

[0070] Example 1

[0071] The specific formula of this rubber inflatable pad, by weight, is as follows: butyl rubber: 92 parts, zinc oxide: 6.0 parts, stearic acid: 2.5 parts, antioxidant NBC: 1.15 parts, carbon black N220: 20 parts, paraffin oil: 7.8 parts, sulfur: 1.75 parts, accelerator TRA: 0.55 parts, accelerator NOBS: 1.25 parts. The preparation process is as follows:

[0072] First, butyl rubber is fed into an internal mixer and plasticized for 5-8 minutes at 110-120℃ and 30-40 r / min to soften the rubber. Then, zinc oxide, stearic acid, and antioxidant NBC are added sequentially, and mixing continues for 3-5 minutes to ensure uniform dispersion of the additives. Next, carbon black N220 and paraffin oil are added, and the temperature is raised to 130-140℃, and mixing is carried out for 8-10 minutes to improve the reinforcing properties and processing fluidity of the rubber compound. Finally, the temperature is lowered to 90-100℃, sulfur, accelerator TRA, and accelerator NOBS are added, and the rubber compound is discharged after mixing for 4-6 minutes to obtain the compound. The compound is placed in an elliptical rectangular U-shaped mold and vulcanized for 15-20 minutes at 150-160℃ and 15-20 MPa. After vulcanization, the rubber is demolded, and an air nozzle and pressure gauge are installed through the air nozzle hole reserved in the mold to finally produce a rubber inflatable pad.

[0073] Example 2:

[0074] The specific formula of this rubber inflatable pad, by weight, is as follows: butyl rubber: 98 parts, zinc oxide: 6.05 parts, stearic acid: 2.6 parts, antioxidant NBC: 1.2 parts, carbon black N220: 21 parts, paraffin oil: 8 parts, sulfur: 1.82 parts, accelerator TRA: 0.62 parts, accelerator NOBS: 1.4 parts. The preparation process is as follows:

[0075] First, place the butyl rubber on a two-roll mill and pass it through a thin mill 3-4 times at a temperature of 80-90℃ and a roll gap of 3-5mm to achieve preliminary plasticization. Then, transfer it to an internal mixer and, at a temperature of 105-115℃ and a speed of 25-35r / min, first add zinc oxide, stearic acid, and antioxidant NBC and mix for 4-6 minutes. Then, add carbon black N220 and paraffin oil, raise the temperature to 125-135℃, and mix for 9-11 minutes to ensure that the fillers are fully integrated into the rubber matrix. Then, cool the mixture to 85-95℃, add sulfur, accelerator TRA and accelerator NOBS, mix for 5-7 minutes, remove the rubber compound, and press it into a uniform thickness sheet using a calender. Cut the sheet into a shape suitable for an elliptical rectangular U-shaped mold, place it in the mold, and vulcanize it for 18-22 minutes at a temperature of 155-165℃ and a pressure of 18-22MPa. After demolding, check the appearance. If there are no defects, install the air nozzle and pressure gauge to complete the preparation of the rubber inflatable pad.

[0076] The performance indicators of Example 1, Example 2, and conventional rubber formulations are compared in Table 1 below:

[0077] Table 1

[0078]

[0079] As can be seen from Table 1, the rubber inflatable pad prepared based on the rubber formulation provided in this application has advantages such as excellent performance and superior properties when applied in collision scenarios.

[0080] In one exemplary embodiment, this application also provides a vehicle, which includes a vehicle body and the vehicle braking device described in the above embodiments.

[0081] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A car bumper and a device for preventing chain collisions, characterized in that, include: Rubber inflatable mat; The first conductive sheet is embedded in and fixed to the first side of the rubber inflatable pad; The second conductive sheet is embedded and fixed in the rubber inflatable pad and is opposite to the first side; when the rubber inflatable pad is installed in front of the car, the second side faces the car body and the first side faces the car's external space. A relay, wherein a first connection point of the relay is connected to the first conductive plate, and a second connection point of the relay is used to connect to an external power source, and the external power source is also connected to the second conductive plate; An automotive brake drive component, wherein the power supply input terminal of the automotive brake drive component is connected to the third connection point of the relay, the automotive brake drive component is used to connect to the brake pedal of the vehicle, and the automotive brake drive component drives the brake pedal to press down when it is powered on. When the rubber inflatable pad is inflated, there is an inflation gap between the first conductive sheet and the second conductive sheet; when the inflated rubber inflatable pad is squeezed, the second conductive sheet will contact the first conductive sheet; when the first connection point of the relay is energized, the second connection point and the third connection point of the relay are connected, so that the vehicle braking drive component is energized and operates.

2. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, The first conductive sheet is embedded and fixed tightly within the rubber inflatable pad on the side away from the front of the vehicle.

3. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 2, characterized in that, The thickness of the first rubber layer is less than the thickness of the second rubber layer. The first rubber layer is the rubber layer between the first conductive sheet and the side of the rubber inflatable pad away from the front of the vehicle. The second rubber layer is the rubber layer between the second conductive sheet and the side of the rubber inflatable pad close to the front of the vehicle.

4. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 3, characterized in that, The thickness of the first rubber layer is 1mm-2mm, and the thickness of the second rubber layer is 5mm-10mm.

5. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, The lengths of the first conductive sheet and the second conductive sheet are greater than or equal to the length of the rubber inflatable pad.

6. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, Both the first conductive sheet and the second conductive sheet are made of copper.

7. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, Also includes: A pressure gauge is used to monitor the air pressure of the rubber inflatable pad.

8. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, The third connection point of the relay is also connected to the first connection point of the relay.

9. The automobile bumper and the device for preventing chain collisions of automobiles according to claim 1, characterized in that, The rubber inflatable pad is elliptical in shape, resembling a rectangular U.

10. The automobile bumper and the device for preventing chain collisions of automobiles according to any one of claims 1-9, characterized in that, The rubber inflatable pad is prepared based on the following rubber formulation, wherein the rubber formulation, by weight parts, comprises: Butyl rubber, 86-98 parts; Zinc oxide, 5.95 parts - 6.05 parts; Stearic acid, 2.3-2.6 parts; Anti-aging agent NBC, 1.1-1.2 parts; Carbon black N220, 19-21 parts; Paraffin oil, 7.5-8 parts; Sulfur, 1.7 to 1.82 parts; Accelerator TRA, 0.5-0.62 parts; Accelerator NOBS, 1.1-1.4 parts.

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